88
MINI-MODEM V.92
✔
You might have had a poor connection because of line conditions or the
problem might have originated on the other end of the line. Try again.
✔
Your ISP might have hung up on you because of lack of activity on your part
or because you exceeded your time limit for the day. Try again.
9.1.5 T
HE
M
ODEM
C
ANNOT
C
ONNECT
W
HEN
A
NSWERING
✔
The default DTR Control command (&D2) inhibits autoanswer. To enable
autoanswer, change DTR Control to &D0, and make sure &Q0, &Q5, or &Q6
is also set. For more information, see the &D command in Chapter 5. For
information on changing the modem’s default configuration, see Section 3.7.
✔
Autoanswer might be disabled. Turn on autoanswer in your communications
program or send the command ATS0=1 (ATS0=2 if you have Caller ID service)
to your modem in terminal mode.
9.1.6 F
ILE
T
RANSFER IS
S
LOWER
T
HAN
I
T
S
HOULD
B
E
✔
If you are using a slow transfer protocol, such as Xmodem, try Zmodem or
Ymodem/G instead.
✔
Is your line noisy? If there is static on your line, the modem has to resend
many blocks of data to ensure accuracy. You must have a clean line for
maximum speed.
✔
Are you downloading a compressed file with MNP 5 hardware compression
enabled? Since hardware data compression cannot compress a file already
compressed by an archiving program, the transfer can be marginally slower
with data compression enabled than with it disabled.
✔
Does your Internet service provider (ISP) use the same 56K protocol as your
modem? The default setting of your modem is to connect using either the
V.92 or the V.90 protocol, depending on which one the ISP’s modem is using.
If your ISP uses the V.90 protocol, the maximum speed you will be able to
upload at is 33,600 bps. Check with your ISP to see which protocols it supports.
✔
Are you trying to send a file to another client modem? If so, then your
maximum possible connect speed is 33,600 bps. You can upload at speeds up
to 48,000 bps only when connected to an ISP that supports the V.92 protocol.
✔
Try entering the I11 command in on-line mode or the &V command in
command mode to display information about the last connection, making a
screen print of the connection statistics, and checking for parameters that
might be unacceptable.
